Levalbuterol Inhalation Solution Interactions

Pregnancy & Breastfeeding

8.1 Pregnancy Pregnancy Exposure Registry There is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to asthma medication, including levalbuterol inhalation solution, during pregnancy. To enroll in MotherToBaby Pregnancy Studies’ Asthma & Pregnancy Study or for more information about the registry, call 1-877-311-8972 or visit www.mothertobaby.org/ongoing-study/asthma. Risk Summary There are no adequate and well-controlled studies of levalbuterol inhalation solution in pregnant women. There are clinical considerations with the use of levalbuterol inhalation solution in pregnant women [see Clinical Considerations] . Following oral administration of levelbuterol HCl to pregnant rabbits, there was no evidence of teratogenicity at doses up to 25 mg/kg/day [approximately 108 times the maximum recommended human daily inhalation dose (MRHDID) of levalbuterol HCl for adults on a mg/ m 2 basis]; however, racemic albuterol sulfate was teratogenic in mice (cleft palate) and rabbits (cramioschisis) at doses slightly higher than the human therapeutic range (see Data) . The estimated background risk of major birth defects and miscarriage for the indicated populations(s) are unknown. In the U.S. general population, the estimated risk of major birth defects and miscarriage in clinically recognized pregnancies is 2 to 4% and 15 to 20% respectively. Clinical Considerations Disease-Associated Maternal and/or Embryo/Fetal Risk In women with poorly or moderately controlled asthma, there is an increased risk of preeclampsia in the mother and prematurity, low birth weight, and small for gestational age in the neonate. Pregnant women should be closely monitored and medication adjusted as necessary to maintain optimal control. Labor or Delivery Because of the potential for beta-adrenergic agonists to interfere with uterine contractility, the use of levalbuterol inhalation solution for the treatment of bronchospasm during labor should be restricted to those patie